The very first [shoplink 4628]Micro Four Thirds to NEX lens adapter[/shoplink] is for sale on eBay! That makes it even easier for current Micro Four Thirds user to switch over to the Sony NEX system. The only prolem will be the different sensor size. I suspect Micro Four Thirds lenses will heavily vignette on Sony sensors because of the larger sensor.
Linkt to eBay: [shoplink 4628]Micro Four Thirds to NEX lens adapter[/shoplink]
UPDATE: I fixed the wrong link. Sorry!